Table 1. Comparison of a priori candidate models of individual differences in corticosterone responsiveness.

id	Random effect	Model description	K	DIC	ΔDIC
3	∼idh(treatment):band	random intercept and slope, no covariance between slope and intercept	6	176.1	0.000
2	∼us(treatment):band	random intercept and slope, covariance between slope and intercept	6	176.5	0.430
1	∼band	random slope only	5	178.9	2.796
4	∼treatment:band	same variance for intercept and slope, no covariance	5	179.4	3.318

The variables under the column “Random effect” indicate the specific random effect in the model in which “band” corresponds to the individual. K is the number of parameters in the model, DIC is deviance information criterion, ΔDIC indicates the difference between DIC value of a given model and the model with the lowest DIC. All models were fit with treatment as a fixed effect in the model; therefore, models differ in their random structure.